Caster



G. BUTTS.

CASTER.

APPLICATION FlLED SEPT. l1, 1919.

Patented Mar. 16, 1920.

SuM/swg GEORGE BOTTS, OF BELLAIRE, OHIO.

CASTER.

Specification of Letters Patent.

Patented Mar. 16, 1920.

Application led September 11, 1919. Serial No. 323,077.

' 70 all w/wm it may concern.'

Be it known that I, GEORGE BoTTs, a citizen of the United Stat-es,residing at Bellaire, in the county of Belmont and State of Ohio, haveinvented certain new and useful Improvements in Casters; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters and figures of referencemarked thereon, which form a part of this specification. A

This invention relates to new and useful improvements in casters andconsists of a simple and efhcient device of this character, which hasfor its object the provision of a ball bearing furniture caster soconstructed as to permit its ready attachment to the leg of any articleof furniture upon which it may be desired to use the same, and whenadjusted in position will permit ot said article of furniture to beeasily and smoothly7 moved, without in any way marring the iioor orcovering therefor.

My invention is illustrated in the accompanying drawings which, with thenumerals of reference marked thereon form a part of this application,and inwhich:

Figure l is a central vertical sectional view taken through the lowerend of a leg of a chair or other article of furniture.

\Fig. 2 is an edge view of the device detached, and

F ig. 3 is a top plan view showing the ball retaining chamber at thelower end of the caster body.

Reference now being had'to the details of the drawing by numerals:

l designates the body portion of the caster made in the form of a singlecasting and provided at its lower end with a circular chamber 3, of sucha diameter as to permit the metallic ball 2 to be inserted, the diameterof the opening being slightly less than the diameter of the ball 2, thusrequiring a slight pressure to force `the ball to its seat within thechamber 3, and the retention of the ball is insured by the overlappingperipheral edge of the opening, as will be readily understood.

It will be noted that the inner end of the ball `retaining chamber 3 isconical and provided with circular guide ways 4, which latter areprovided with a series of small steel balls 5, upon the surface of whichthe ball 2 has a bearing when in place.

6 designates a metallic rod screw threaded at its lower end to engagethe screw threaded opening 6 formed in the upper :tace of said bodyportion, its upper portion being pro-V vided with spring arms 7,'7,which arms are Dolted at their lower ends to the opposite sides of saidchamber 3, the free ends of the rod being extended and having theireXtreme ends bent slightly outward, as at 8.

In assembling the parts, the body portion l of the caster is inverted,the small steel balls 5 are placed within the ball chamber 3. The largeball 2 is then iitted within the chamber and forced to its seat with asharp blow, after which the caster is reversed, and the plate or pan 9,which may be of square er circular outline, having a central openingcorresponding with the opening in the body portion of the caster, isplaced upon the up- Y per end of the body portion 1. VThe screw threadedend 6 of the member 6 is passed downward into engagement with the screwthreaded opening l0 in the portion l. The caster is then placed inposition upon the end of the leg of a chair, etc., the spring arms 7being inserted within the opening in said chair leg, etc., which isprovided for their reception.

It will be understood that while I have shown a caster circular in crosssection, that the same could be rectangular or of other form, adapted tothe particular shape of the article to which same is applied.

lflhat I claim to be new is:

A caster comprising a block with a circular outlined recess in thebottom thereof, the walls of the recess beine slightly flexible andadapted to yield as the ball.. bearings are sprung into the recess, aflanged cup fitted to the upper end of said block, said cup threadedapertures, a screw fitted in said apertures, a portion oit the screwabove the surface of the cup being angular in cross section, andresilient angled arms fastened to opposite faces or the angular portionof said threaded screw, and adapted to engage the inner wall of the boreof a leg designed to rest in said cup.

In testimony whereof I hereunto affix my signature.

GEORGE BOTTS.

and block having registering' andl

